scholarly journals Thermal conductivity modeling of monodispersed microspheres using discrete element method

2021 ◽  
Vol 130 (16) ◽  
pp. 165104
Author(s):  
Jian Zeng ◽  
Ka Man Chung ◽  
Xintong Zhang ◽  
Sarath Adapa ◽  
Tianshi Feng ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Discrete Element Method ◽  
Discrete Element ◽  
Conductivity Modeling ◽  
Element Method

Thermal Conductivity of Cement Concrete Using Discrete Element Method

2014 ◽  
Vol 1023 ◽  
pp. 32-35
Author(s):  
Wei Dong Liu
Keyword(s):  
Thermal Conductivity ◽  
Numerical Model ◽  
Discrete Element Method ◽  
Linear Thermal Expansion ◽  
Discrete Element ◽  
Constant Heat Flux ◽  
Test Method ◽  
Great Level ◽  
Cement Concrete ◽  
Element Method

Consideration on the traditional experiment was time-consuming and required a major investment in human and material resource, even leaded to a great level of error in the process of experiment. The new test method of thermal conductivity of cement concrete based on discrete element method was presented. The cylinder-shaped specimen was created via the mass graduation of the cement concrete, and make sure the numerical model was identical to the truth experiment. The thermal micro-properties composed of density,specific heat, coefficient of linear thermal expansion and thermal resistance were conducted. The applied constant heat flux and constant temperature as the boundaries were investigated via the herein developed model. The results testified that the virtual test data was nearly identical with the analytical values for both different boundaries, and it confirmed that the new numerical model using discrete element method is feasible and reliable. It also supplied a new method on thermal properties study.

Discrete element method to model cracking for two layer systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 101-108
Author(s):  
Daniel Varney ◽  
Douglas Bousfield
Keyword(s):  
Discrete Element Method ◽  
Flexural Modulus ◽  
Single Layer ◽  
Discrete Element ◽  
Flexural Stress ◽  
Layer System ◽  
Three Point Bending ◽  
Moving Force ◽  
Coating Layers ◽  
Element Method

Cracking at the fold is a serious issue for many grades of coated paper and coated board. Some recent work has suggested methods to minimize this problem by using two or more coating layers of different properties. A discrete element method (DEM) has been used to model deformation events for single layer coating systems such as in-plain and out-of-plain tension, three-point bending, and a novel moving force picking simulation, but nothing has been reported related to multiple coating layers. In this paper, a DEM model has been expanded to predict the three-point bending response of a two-layer system. The main factors evaluated include the use of different binder systems in each layer and the ratio of the bottom and top layer weights. As in the past, the properties of the binder and the binder concentration are input parameters. The model can predict crack formation that is a function of these two sets of factors. In addition, the model can predict the flexural modulus, the maximum flexural stress, and the strain-at-failure. The predictions are qualitatively compared with experimental results reported in the literature.

Sign in / Sign up

Export Citation Format

Share Document